Water-tube boiler



(No Model.) 2 Sheets-Sheet 2 B. J. MOORE. WATER TUBE BOILER.

Patented June 23, 1885.

UNITED STATES PATENT OFFICE.

EDVARD J. MOORE, OF BALTIMORE, MARYLAND.

WATER-TUBE BOILER.

SPECIFICATION forming part of Letters Patent No. 320,809, dated June 23, 1885.

Application ilcd August 26. 1884. (No modul) 'which is cutaway, and an inclined flat tubesheet inserted in lieu thereof to form one side of the shell and complete the same. The tubes are secured in this sheet at an angle of ninety degrees, preferably by expansion, and their open ends are accessible'for cleaning` or other purpose from the interior of the shell. This construction enables me to dispense with tube- Stoppers of any description, and gives alarge body of water at the back end of the boiler where it is required. The lower end of the shell also answers the purpose of a mud-drum, from which deposited matter is blown, and the cost of the boiler is much reduced.

My invention consists, secondly, in providing the cylindrical shell before referred to with a flue which extends from the offset formed bythe cutting away of a portion of the said shell, as described, to the upper end thereof, or through the side of the shell to the front, to carry od the products of combustion from around the water-tubes. By this means the water in the cylindrical shell is heated at a higher point than is usual in boilers of this class, and the steam superheated as in steamchimneys of ordinary non-sectional boilers.

My invention consists, thirdly7 in combining with the vertical cylindrical shell above referred to a horizontal cylinder which extends from the said shell over the water-tubes and is connected to the front header. This cylinder contains both water and steam, and is in direct contact with the' heated gases in their passage to the flue in the vertical cylindrical shell.

My invention consists, fourthly, in inserting between the steam-pipe and the steamdrulns ofthe boiler a cylinder of larger transverse area than the steam-pipe containing perforated diaphragms, which separate water from the steam passing through them, and a series of exit pipes or necks, which conduct the entrained and intercepted water from the first to a second cylinder underneath the iirst, and which is in communication with the water-space of the boiler by means of a pipe which passes through its under side to about the center. The lower cylinder constitutes a settling-chamber, from which sediment may be blown out, and the feed-pipe extends longitudinally of this second or under cylinder, and the feed, consequently, is heated to the boiling-pointbeforereaching theboilerproper.

In the drawings forming a part hereof, Figure I is a longitudinal section of the improved boiler, and Fig. Il a partly-transverse section of the same.

A A are the water-tubes. which are placed in an inclined position, and at the front end connected together by means ofa leg orheader, a, formed of plates suitably braced. This leg or header in itself embodies no part of my present invention.

B is a vertical cylindrical shell, aportion of which is cut away, and an inclined tube-sheet,

b, placed therein, into which the tubes A are fastened at an angle of ninety degrees, preferably by expansion.

C is a head inserted in the offset formed by cutting away the cylindrical shell, from which extends the flue D. A second head, c, closes the upper end ofthe cylindrical shell B.

E is a horizontal shell or cylinder leading from the vertical shell B toward the front end of the boiler, situated directly over the tubes A, and to which the front leg or header a is fastened. In some cases the cylindrical shell B may terminate immediately above the horizontal shell E, and the flue D be brought through the horizontal shell, as shown in dotted lines denoted by d.

F is a cylinder placed horizontally of the boiler and connected by means of a pipe, e, to the steam-space thereof. One end of this cylinder is closed, and to the other the steampipe G is bolted. This cylinder F is of greater cross-area than the steam-pipe, and is provided with perforated diaphragms f to separate water from the steam as the same passes to the steam-pipe. It is also in direct contact with heat from the furnace, which is represented by H, and the steam therein is consequently superheated. Entrained water passes IOC from the cylinder F through pipes g to another cylinder, I, under the one F, and thence by means of a pipe, h, to the boiler. It will be seen that the upper end of the pipe 7L is at about the center of the cylinder I, which construction forms a settling-chamber, J, for mud and other sediment.

Awater-separator, such as above described, is particularly applicable to awater-tube boiler, for the reason that the circulation of water in such a boiler is more rapid and more water entrained than in ordinary boilers when only alimited part thereof is effective heating-surface.

It is found that with this settlingchamber and the mud-drum the boiler can be kept in a very clean condition and free from scale Where salt-water is used.

The boiler is incased in briclework, which is denoted by K, and where a series of boilers are employed the same are separated by walls, one of which is shown and marked L.

The exterior wall at the sides of the boiler are provided with flanged plates z', which are bolted together to form a complete exterior covering.

The feed-water pipe before mentioned is marked k, and it will be seen that it .is immersed in water in the lower cylinder, I. The object of this is to heat the feed-water to the boilingpoint before it passes to the boiler proper.

In the drawings I have shown one flue only in each vertical cylindrical shell; but I do not li mit myself to this construction, as two or more may be used,or a series of tubes of small size.

I claim as my inventionl. In a water-tube boiler, the tubes placed in an inclined position and at one endinserted at a right anglein a tube-sheet forming a part of and situated within a Verti cal cylindrical shell, substantially as and for the purpose specified.

2. In a watertube boiler, the tubes at one end inserted in a tube-sheet forming a part of a cylindrical shell having a flue, the lower end of which is in communication with the vspace around the said tubes and adapted to carry off the products of' combustion, substantially as and for the purpose specified.

3. In a watentube boiler, a vertical cylinA drical shell, with which the rear ends of the said tubes are in communication, combined with a horizontal shell extending from the vertical one over the said tubes and connected to the front head or leg, substantially as specified.

4. In combination with the steam-drum and steam-pipe of a water-tube boiler, a horizontal cylinder inserted between the said drum and pipe, of larger transverse area than the said steam-pipe, containing perforated diaphragms, and a second cylinder situated underneath the first and in communication there- Withthrough the medium of suitable pipes, and another pipe to connect the saidlowcr cylinder with the water-tubes of the boiler, substantially as and for the purpose specified.

5. In combination Withthe steamdrum and steam-pipe of a Water-tube boiler, a horizontal cylinder inserted between the said drum and pipe, of larger transverse area than the said steam-pipe, containing perforated diaphragms, and a second cylinder situated underneath the first and in communication therewith through the medium of suitable pipes, and another pipe leading from near the eent-er of the second cylinder to connect the same with the Water-tubes of the boiler, substantially as and for the purpose specified.

EDVARI) J. MOORE.

Vit n esses:

WM. T. HOWARD, Otras. B. CAssADY. 

